A congenital absence of t
A congenital absence of this organ can be caused by DiGeorge syndrome, and tumors of this organ are associated with myasthenia gravis. Following puberty, it is gradually replaced with adipose cells in a process called involution. Nude mice are useful in research because they lack this organ, allowing foreign tissues to be grafted. In its cortex, MHCs are introduced to positively select for hematopoietic progenitor cells that bind strongly. For 10 points, name this immune and lymphatic organ that produces T-cells and facilitates their maturation.
A congenital absence of this organ can be caused by DiGeorge syndrome, and tumors of this organ are associated with myasthenia gravis.
{thymus}